The numbered diseases: first through sixth.
D002965:Classification; D004890:Erythema / Q000266:history*; D005077:Exanthema Subitum / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D008457:Measles / Q000266:history*; D012409:Rubella / Q000266:history*; D012541:Scarlet Fever / Q000266:history*